CA3002254C - Device for converting the kinetic energy of waves, water flows or wind into mechanical energy - Google Patents
Device for converting the kinetic energy of waves, water flows or wind into mechanical energy Download PDFInfo
- Publication number
- CA3002254C CA3002254C CA3002254A CA3002254A CA3002254C CA 3002254 C CA3002254 C CA 3002254C CA 3002254 A CA3002254 A CA 3002254A CA 3002254 A CA3002254 A CA 3002254A CA 3002254 C CA3002254 C CA 3002254C
- Authority
- CA
- Canada
- Prior art keywords
- turbines
- flow
- cross flow
- rotation
- energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 241000555745 Sciuridae Species 0.000 claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000005465 channeling Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 208000034699 Vitreous floaters Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- -1 dimensions Substances 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000011067 equilibration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000001944 turbinate Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B17/00—Other machines or engines
- F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
- F03B17/062—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction
- F03B17/063—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially at right angle to flow direction the flow engaging parts having no movement relative to the rotor during its rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/22—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the flow of water resulting from wave movements to drive a motor or turbine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/24—Rotors for turbines
- F05B2240/244—Rotors for turbines of the cross-flow, e.g. Banki, Ossberger type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Wind Motors (AREA)
- Surgical Instruments (AREA)
Abstract
The device comprises a plurality of cross flow turbines (9), each one comprising fixed curved blades (5, 6) arranged in squirrel cage configuration about an axis of rotation (A). The turbines (9) are mounted on a floating support (10) on the water, placed directly in the fluid flow (18) and arranged successively one after another with their axes (A) parallel to each other and perpendicular to the flow (18).
Description
DEVICE FOR CONVERTING THE KINETIC ENERGY OF WAVES, WATER
FLOWS OR WIND INTO MECHANICAL ENERGY
TECHNICAL FIELD
The invention relates generally to a low cost device that makes an efficient use of the energy from waves or water or wind currents, using cross-flow turbines and without the need of deflectors. It is especially suitable for pumping sea water and for generating electricity by harnessing energy from the sea waves.
STATE OF THE ART
Known are in the art the devices for converting kinetic energy from a flow of waves, wind or water currents into mechanical energy of rotation (for generation of electricity), comprising a cross flow turbine, the turbine being provided with fixed curved blades arranged in squirrel cage configuration about an axis of rotation.
Examples of these devices are described in documents KR100191636 B1 and KR101492768B1.
KR100191636 B1 discloses a turbine mounted on two floaters that maintain the lower half of the turbine immersed, thus causing that the flow that passes between the floaters rotates the turbine.
In KR101492768 B1 a turbine mounted on a floating device is shown, but the arrangement of the turbine is fully sunk. The device is complex, since it comprises a surrounding casing designed to channel water in the lower part of the turbine. =
In general, the squirrel configuration turbines with fixed blades that operate in liquid fluids are provided with a deflector aimed at channeling the fluid through the outer portion of the turbine, and only through one side of the
FLOWS OR WIND INTO MECHANICAL ENERGY
TECHNICAL FIELD
The invention relates generally to a low cost device that makes an efficient use of the energy from waves or water or wind currents, using cross-flow turbines and without the need of deflectors. It is especially suitable for pumping sea water and for generating electricity by harnessing energy from the sea waves.
STATE OF THE ART
Known are in the art the devices for converting kinetic energy from a flow of waves, wind or water currents into mechanical energy of rotation (for generation of electricity), comprising a cross flow turbine, the turbine being provided with fixed curved blades arranged in squirrel cage configuration about an axis of rotation.
Examples of these devices are described in documents KR100191636 B1 and KR101492768B1.
KR100191636 B1 discloses a turbine mounted on two floaters that maintain the lower half of the turbine immersed, thus causing that the flow that passes between the floaters rotates the turbine.
In KR101492768 B1 a turbine mounted on a floating device is shown, but the arrangement of the turbine is fully sunk. The device is complex, since it comprises a surrounding casing designed to channel water in the lower part of the turbine. =
In general, the squirrel configuration turbines with fixed blades that operate in liquid fluids are provided with a deflector aimed at channeling the fluid through the outer portion of the turbine, and only through one side of the
2 turbine.
Thus, in general the known devices that operate with squirrel configuration turbines are complex devices that do not allow to maximize the harnessing of the energy of the incident flow. In particular, these devices do not allow to optimally extract energy from the waves energy, namely at the level of the water surface, and in general their structure is complex and cumbersome.
DESCRIPTION OF THE INVENTION
To overcome the shortcomings of the prior art, the present invention proposes a device for converting kinetic energy of a flow from waves, wind or water currents into mechanical energy of rotation (for generation of electricity), comprising a plurality of cross flow turbines, each one comprising fixed curved blades arranged in squirrel cage configuration about an axis of rotation.
According to the invention the turbines are mounted on a floating support on the water, directly placed in the fluid flow and arranged successively one after another with their axes parallel to each other and perpendicular to the fluid flow.
This device is specially adapted to make efficient use of energy from =
waves, wind and water currents (it is very robust and economic) since it makes use of low cost cross-flow turbines, without the need of costly deflectors, baffles or flow channeling means destined to channel the flow in only a part of the turbines. The successive turbines allow for successively diminishing the flow energy, and then, the energy remaining after the flow having gene through a turbine is harnessed in the subsequent one.
In particular, the invention is very advantageous for its use in harnessing wave energy. The wave front, when reaching the turbines, mainly involves a vertical movement of the particles, which can be harnessed by the turbine. As the wave front progresses through successive turbines, it breaks, which means that the movement of the flow acquires progressively a horizontal direction, which can then be exploited by the following turbines.
Thus, in general the known devices that operate with squirrel configuration turbines are complex devices that do not allow to maximize the harnessing of the energy of the incident flow. In particular, these devices do not allow to optimally extract energy from the waves energy, namely at the level of the water surface, and in general their structure is complex and cumbersome.
DESCRIPTION OF THE INVENTION
To overcome the shortcomings of the prior art, the present invention proposes a device for converting kinetic energy of a flow from waves, wind or water currents into mechanical energy of rotation (for generation of electricity), comprising a plurality of cross flow turbines, each one comprising fixed curved blades arranged in squirrel cage configuration about an axis of rotation.
According to the invention the turbines are mounted on a floating support on the water, directly placed in the fluid flow and arranged successively one after another with their axes parallel to each other and perpendicular to the fluid flow.
This device is specially adapted to make efficient use of energy from =
waves, wind and water currents (it is very robust and economic) since it makes use of low cost cross-flow turbines, without the need of costly deflectors, baffles or flow channeling means destined to channel the flow in only a part of the turbines. The successive turbines allow for successively diminishing the flow energy, and then, the energy remaining after the flow having gene through a turbine is harnessed in the subsequent one.
In particular, the invention is very advantageous for its use in harnessing wave energy. The wave front, when reaching the turbines, mainly involves a vertical movement of the particles, which can be harnessed by the turbine. As the wave front progresses through successive turbines, it breaks, which means that the movement of the flow acquires progressively a horizontal direction, which can then be exploited by the following turbines.
3 In the case of the waves devices, where the water particles oscillate vertically, describing trochoidal trajectories and creating powerful surface currents in the form of breakers, the turbines as used in the present invention will always rotate in the same rotating direction independently of the incident flow, which in turn allows simplifying the electrical elements or downstream power electronics that will eventually be connected to the turbines. It works as a reef of offshore turbines or onshore breaker.
According to several optional features that can be combined with each other whenever technically possible:
- When operating as a wave's device, the axes of the turbines are parallel and horizontally mounted on the floating hulls structure support. In particular, this has to be understood as that the axes of the turbines are mounted on the floating support such that the axes are arranged horizontally when the device is placed in the water. This arrangement is particularly suited to take advantage of the surface energy of a vertical and horizontal stream of water. It also implies a reduced space occupation in the vertical direction, allowing it to be used in shallow waters or as a breakwater. It also allows getting it in and out of the water with a tugboat.
- the axes of the turbines are contained in the same plane, thus allowing to optimally successively harnessing the waves flow energy.
- the floating support has a U-cross section profile that forms a channel, such that a bottom hull or wall and two side hulls or walls, the axes of the turbines being rotatably supported between the two side hulls. This structure allows the hulls simultaneously supporting the turbines, to protect them inferiorly and to channel water to the turbines as well as an easy access to the turbines from above.
the structure comprises floating control means so that the device is movable between a lower position where the turbines are completely sunk and an upper position where the turbines are arranged completely above the water
According to several optional features that can be combined with each other whenever technically possible:
- When operating as a wave's device, the axes of the turbines are parallel and horizontally mounted on the floating hulls structure support. In particular, this has to be understood as that the axes of the turbines are mounted on the floating support such that the axes are arranged horizontally when the device is placed in the water. This arrangement is particularly suited to take advantage of the surface energy of a vertical and horizontal stream of water. It also implies a reduced space occupation in the vertical direction, allowing it to be used in shallow waters or as a breakwater. It also allows getting it in and out of the water with a tugboat.
- the axes of the turbines are contained in the same plane, thus allowing to optimally successively harnessing the waves flow energy.
- the floating support has a U-cross section profile that forms a channel, such that a bottom hull or wall and two side hulls or walls, the axes of the turbines being rotatably supported between the two side hulls. This structure allows the hulls simultaneously supporting the turbines, to protect them inferiorly and to channel water to the turbines as well as an easy access to the turbines from above.
the structure comprises floating control means so that the device is movable between a lower position where the turbines are completely sunk and an upper position where the turbines are arranged completely above the water
4 level. Thus, the turbines can be accessed for maintenance and the device can be moved along waters of varying depth.Thus, when placed in the waves the device will operate as a reef or a breakwater and it will be possible to adjust its vertical position to optimize the performance or to minimize the impact of storms.
- the floating control means are floodable floats.
In another variant of the invention, the axes of the turbines are vertically mounted with respect to the floating support. In this variant, the axes of the turbines can be arranged above the floating support for harnessing wind energy or placed under the level of the floating structure to operate as a water current power plant.
in ail the variants described, it is envisaged that optionally:
- the axes of the turbines are arranged at regular intervals.
- the blades of the turbines have a cylindrical envelope.
- the floating support comprises means for anchoring it to the seabed, to prevent any takeoff but allowing some rotation around the anchor.
BRIEF DESCRIPTION OF THE DRAWINGS
To complete the description and in order to provide for a better understanding of the invention, a set of drawings is provided. Said drawings form an integral part of the description and illustrate embodiments of the invention, which should not be interpreted as restricting the scope of the invention, but just as examples of how the invention can be carried out. The drawings comprise the following figures:
FIG. 1 shows the theoretical pressure distribution on the surface of a circular cylinder according to the class's theory.
FIG. 2 shows the experimental pressure distribution on the surface of a circular cylinder.
- the floating control means are floodable floats.
In another variant of the invention, the axes of the turbines are vertically mounted with respect to the floating support. In this variant, the axes of the turbines can be arranged above the floating support for harnessing wind energy or placed under the level of the floating structure to operate as a water current power plant.
in ail the variants described, it is envisaged that optionally:
- the axes of the turbines are arranged at regular intervals.
- the blades of the turbines have a cylindrical envelope.
- the floating support comprises means for anchoring it to the seabed, to prevent any takeoff but allowing some rotation around the anchor.
BRIEF DESCRIPTION OF THE DRAWINGS
To complete the description and in order to provide for a better understanding of the invention, a set of drawings is provided. Said drawings form an integral part of the description and illustrate embodiments of the invention, which should not be interpreted as restricting the scope of the invention, but just as examples of how the invention can be carried out. The drawings comprise the following figures:
FIG. 1 shows the theoretical pressure distribution on the surface of a circular cylinder according to the class's theory.
FIG. 2 shows the experimental pressure distribution on the surface of a circular cylinder.
5 FIG. 3 shows the theoretical pressure distribution on an outboard aerodynamic shaped circular cylinder.
FIG. 4 shows the cross section of a crossflow turbine with bent sheet blades.
FIG. 5 shows the cross section of a crossflow turbine with aerodynamic blades.
FIG. 6 shows the arrangement of several turbines supported on an anchored hull floating base to harness the energy of a wave front.
FIG. 7 shows the above arrangement in a transverse or profile view, to indicate the oscillating level of the water in the presence of waves.
FIG. 8 shows the flow characteristics affected by an aerodynamic shaped outboard edged circular cylinder according to researches related to the invention, emphasizing the boundary zone between the uniform outer flow and the altered zone or affected by the solid.
FIG. 9a shows the arrangement of the floating support and turbines to extract energy from a water stream.
FIG. 9b is a profile showing a series of turbines mounted with their axes in the same plane to extract energy from the waves.
FIG. 9c is analogous to FIG. 9a but in the case of its application to wind, with the turbines on the upper part.
FIG. 10 to 12 show a side elevated view, a plan view and a frontal elevated view respectively of a preferred embodiment of the present invention.
FIG. 4 shows the cross section of a crossflow turbine with bent sheet blades.
FIG. 5 shows the cross section of a crossflow turbine with aerodynamic blades.
FIG. 6 shows the arrangement of several turbines supported on an anchored hull floating base to harness the energy of a wave front.
FIG. 7 shows the above arrangement in a transverse or profile view, to indicate the oscillating level of the water in the presence of waves.
FIG. 8 shows the flow characteristics affected by an aerodynamic shaped outboard edged circular cylinder according to researches related to the invention, emphasizing the boundary zone between the uniform outer flow and the altered zone or affected by the solid.
FIG. 9a shows the arrangement of the floating support and turbines to extract energy from a water stream.
FIG. 9b is a profile showing a series of turbines mounted with their axes in the same plane to extract energy from the waves.
FIG. 9c is analogous to FIG. 9a but in the case of its application to wind, with the turbines on the upper part.
FIG. 10 to 12 show a side elevated view, a plan view and a frontal elevated view respectively of a preferred embodiment of the present invention.
6 DESCRIPTION OF A WAY OF CARRYING OUT THE INVENTION
As it can be seen in FIG. 1, according to the classical theory and in the case of a perfect fluid, there would be no resistance or drag a solid placed in a moving fluid because of the equilibration of the pressures in the front and back sides of the solid 1. Therefore, this theory gives rise to the D'Alembert's paradox, consisting in that theoretically the drag force is zero on a body moving with constant velocity relative to the fluid, in direct contradiction to the observation of substantial drag on bodies moving relative to fluids.
Consequently, always according to the classical theory, if the solid were a cylinder there would not be a pressure difference between the two halves of the cylinder. This would apply to a turbine squirrel cage, whose envelope is cylindrical, so that according to this theory, there would be no possibility of extracting energy from the turbines placed fully facing the flow, i.e. without deflectors or water channeling means to the halves of the turbines 9 as disclosed in the documents of the prior art.
Instead, the practical implementation of the invention has led to industrially well tested experimental results, in particular it has been determined that an existing suction action by the downstream flow prevents from the theoretical existence of positiVe pressures on the back of the cylinder 1, as shown in FIG. 2 for a cylinder or an outboard edged cylinder as shown in FIG.3.
This formulation developed for cylinders and other simple shapes, clearly states that the pressure distribution as shown in 2-FIG. 3 has a pressure gradient in the outside flow direction 3 enabling forcing the fluid flow in a cylindrical turbine without deflectors or distributors.
Any fluid passing through the cylindrical turbine area, as shown in 8-FIG. 4, is deflected by the curvature of the blades thus creating a reaction in the blades with respect to the axis always of the same sign and consequently the turbine 9 will always rotate in the same direction independently of the flow. This facilitates its practical implementation jointly with rotary pumps or
As it can be seen in FIG. 1, according to the classical theory and in the case of a perfect fluid, there would be no resistance or drag a solid placed in a moving fluid because of the equilibration of the pressures in the front and back sides of the solid 1. Therefore, this theory gives rise to the D'Alembert's paradox, consisting in that theoretically the drag force is zero on a body moving with constant velocity relative to the fluid, in direct contradiction to the observation of substantial drag on bodies moving relative to fluids.
Consequently, always according to the classical theory, if the solid were a cylinder there would not be a pressure difference between the two halves of the cylinder. This would apply to a turbine squirrel cage, whose envelope is cylindrical, so that according to this theory, there would be no possibility of extracting energy from the turbines placed fully facing the flow, i.e. without deflectors or water channeling means to the halves of the turbines 9 as disclosed in the documents of the prior art.
Instead, the practical implementation of the invention has led to industrially well tested experimental results, in particular it has been determined that an existing suction action by the downstream flow prevents from the theoretical existence of positiVe pressures on the back of the cylinder 1, as shown in FIG. 2 for a cylinder or an outboard edged cylinder as shown in FIG.3.
This formulation developed for cylinders and other simple shapes, clearly states that the pressure distribution as shown in 2-FIG. 3 has a pressure gradient in the outside flow direction 3 enabling forcing the fluid flow in a cylindrical turbine without deflectors or distributors.
Any fluid passing through the cylindrical turbine area, as shown in 8-FIG. 4, is deflected by the curvature of the blades thus creating a reaction in the blades with respect to the axis always of the same sign and consequently the turbine 9 will always rotate in the same direction independently of the flow. This facilitates its practical implementation jointly with rotary pumps or
7 generators, in practice better than the alternative ones.
The inventive energy recovery device 19 in its most general form consists of arranging several crossflow type cylindrical turbines 9, as shown in FIG. 4 and in FIG. 5, with their axes parallel, spaced apart, interposing the water flow as shown in FIG. 7, which based in the physical principle described above, impinges on the curved blades 5-FIG. 4 and 6-FIG. 5, such that the turbine always rotates in the same direction 7-FIG.4 regardless of the direction or characteristics of the flow B-FIG. 4. In particular, FIG. 9b, in the case of waves 13, all the turbines will rotate with the same rotation direction. In this case, the front of energy is represented by the water level 18.
The implementation of the invention was inspired using the velocity distribution obtained analytically, as shown in FIG. 8. In particular, the fluid area affected by the cylinder 17-FIG. 8 indicates that the active fluid front 3 is defined as a close and finite environment.
The cylindrical crossflow turbines 9, which does not unfavorably interfere with each other, will be arranged with their axes in parallel, as shown in FIG. 6, interposed in the energy flow 16, as shown in FIG. 7, FIG. 9a and 9c.
The rotational energy in the turbine, with low angular speed and high torque, will then be transformed by conventional means into electrical, hydraulic or mechanical energy.
To maintain a maximum turbine 9 resistance against the impulse of the fluid, in the case of the waves energy recovering system (vertical and horizontal flow) an anchor 14 and a horizontal stabilizer are also necessary. Flooding tubes arranged in the side hulls 12A, 126 allow adjusting the vertical position.
Specifically, it will allow to sink the turbines 9 in cases of storms or to take them out from the water for maintenance. In the case of recovering energy frqm currents any known anchoring system is usable.
This floating support 10 can have water passage slits to destabilize the
The inventive energy recovery device 19 in its most general form consists of arranging several crossflow type cylindrical turbines 9, as shown in FIG. 4 and in FIG. 5, with their axes parallel, spaced apart, interposing the water flow as shown in FIG. 7, which based in the physical principle described above, impinges on the curved blades 5-FIG. 4 and 6-FIG. 5, such that the turbine always rotates in the same direction 7-FIG.4 regardless of the direction or characteristics of the flow B-FIG. 4. In particular, FIG. 9b, in the case of waves 13, all the turbines will rotate with the same rotation direction. In this case, the front of energy is represented by the water level 18.
The implementation of the invention was inspired using the velocity distribution obtained analytically, as shown in FIG. 8. In particular, the fluid area affected by the cylinder 17-FIG. 8 indicates that the active fluid front 3 is defined as a close and finite environment.
The cylindrical crossflow turbines 9, which does not unfavorably interfere with each other, will be arranged with their axes in parallel, as shown in FIG. 6, interposed in the energy flow 16, as shown in FIG. 7, FIG. 9a and 9c.
The rotational energy in the turbine, with low angular speed and high torque, will then be transformed by conventional means into electrical, hydraulic or mechanical energy.
To maintain a maximum turbine 9 resistance against the impulse of the fluid, in the case of the waves energy recovering system (vertical and horizontal flow) an anchor 14 and a horizontal stabilizer are also necessary. Flooding tubes arranged in the side hulls 12A, 126 allow adjusting the vertical position.
Specifically, it will allow to sink the turbines 9 in cases of storms or to take them out from the water for maintenance. In the case of recovering energy frqm currents any known anchoring system is usable.
This floating support 10 can have water passage slits to destabilize the
8 wave together with the effect of turbines and make the wave breaks.
The type of waves to be found in the installation site, and the cost's and capacity's installation will condition the size, number and arrangement of the turbines, as well as its funding. Its physical effect will be that of a reef in a floating off shore installation. If its location is made by a breakwater on the coast, its effect will be like a breakwater one.
Given the high torque and uneven rotation provided by the waves, it can be very useful and economical to pump seawater at high pressure to a reservoir on land or then turbinate or pump sea water to a desalination unit by reverse osmosis, or any other known type of use that avoids energy transformation stages. The auxiliary equipment may be located within the floating support 10-FIG. 7 or on land, to where the desalinate water, compressed air, water or oil pressure or electric power, would head according to the chosen design.
In all cases preferably cylindrical turbines 9 will be arranged as in FIGS.
4, 5, 6 and 7, in the device 19, of the type used in crossflow turbines. They consist of a series of curved blades preferably arranged in a squirrel cage as shown in FIGS. 4 and 6, reacting to the passage of fluid with a torque always the same sign, even with a changing direction of flow on the blade.
The preferred shape of the profiles will be such as the described in the patent ES2074010 by the same inventor, like the profiles shown in FIG. 5, or may be a simple bent plate or any curved surface 5-FIG. 4 for economy purposes.
The cylindrical turbine will have the side faces or bases of the cylinder closed to the flow with two disks which also support the blades and the mechanical axis, comprising also other intermediate discs to stiffen the blades, as it is usual in this type of turbine. The diameter and height of the cylindrical turbine will depend on the flow characteristics and power requirements and available space, its calculation preferably developed through the equations
The type of waves to be found in the installation site, and the cost's and capacity's installation will condition the size, number and arrangement of the turbines, as well as its funding. Its physical effect will be that of a reef in a floating off shore installation. If its location is made by a breakwater on the coast, its effect will be like a breakwater one.
Given the high torque and uneven rotation provided by the waves, it can be very useful and economical to pump seawater at high pressure to a reservoir on land or then turbinate or pump sea water to a desalination unit by reverse osmosis, or any other known type of use that avoids energy transformation stages. The auxiliary equipment may be located within the floating support 10-FIG. 7 or on land, to where the desalinate water, compressed air, water or oil pressure or electric power, would head according to the chosen design.
In all cases preferably cylindrical turbines 9 will be arranged as in FIGS.
4, 5, 6 and 7, in the device 19, of the type used in crossflow turbines. They consist of a series of curved blades preferably arranged in a squirrel cage as shown in FIGS. 4 and 6, reacting to the passage of fluid with a torque always the same sign, even with a changing direction of flow on the blade.
The preferred shape of the profiles will be such as the described in the patent ES2074010 by the same inventor, like the profiles shown in FIG. 5, or may be a simple bent plate or any curved surface 5-FIG. 4 for economy purposes.
The cylindrical turbine will have the side faces or bases of the cylinder closed to the flow with two disks which also support the blades and the mechanical axis, comprising also other intermediate discs to stiffen the blades, as it is usual in this type of turbine. The diameter and height of the cylindrical turbine will depend on the flow characteristics and power requirements and available space, its calculation preferably developed through the equations
9 described for example in Doria J.J., Granero F. TEORIA 1NNOVADORA EN
AERODINA MICA. PROTOT1POS Y PATENTES Actas III Congreso Internacional de Ingenieria de Proyectos. 1.996 Barcelona.
The shaft, as described, is arranged perpendicular to the foreseeable and variable flow directions and it is connected to any known power transmitting means 15 (pump, generator, compressor, gear ...).
FIG. 9a shows an embodiment of the device 19 for the harnessing of a water stream, illustrated as a rectangular front 18. Here, the turbines are placed with their axes vertical, under the floating support 10, which is in turn supported by two huils 20. Only the first turbine of each row is shown, the successive turbines are placed behind.
FIG. 9c shows an embodiment of the device 19 analogous to that shown in FIG. 9a, but destined to harness the energy of a wind stream, and therefore the turbines are placed with their axes above the floating support.
FIGS. 10 to 12 show an embodiment of the invention comprising four rows, each provided with six successive turbines 9, arranged with their axes horizontal and in the same plane. The floating support 10 is basically a catamaran wherein the two hulls 10A, 108 support the axes of the turbines 9.
Four rigid sails/ wings 10C fixed on the ends of the hulls' 10A, 10B serve for orienting the base. The hulls 10A, 10B have floodable spaces inside that can extend in reservoirs placed inside the wings, which then contribute to control the water level. Although, there are six turbines in each row, it is obvious that more turbines can be provided to harness the maximum energy from the waves or current.
In this text, the term "comprises" and its derivations (such as "comprising", etc.) should not be understood in an excluding sense, that is, these terms should not be interpreted as excluding the possibility that what is described and defined may include further elements, steps, etc.
The invention is obviously not limited to the specific embodiments described herein, but also encompasses any variations that may be considered by any person skilled in the art (for example, as regards the choice of materials, dimensions, components, configuration, etc.), within the general scope of the 5 invention as defined in the claims.
References (1) Circular cylinder, without blades.
AERODINA MICA. PROTOT1POS Y PATENTES Actas III Congreso Internacional de Ingenieria de Proyectos. 1.996 Barcelona.
The shaft, as described, is arranged perpendicular to the foreseeable and variable flow directions and it is connected to any known power transmitting means 15 (pump, generator, compressor, gear ...).
FIG. 9a shows an embodiment of the device 19 for the harnessing of a water stream, illustrated as a rectangular front 18. Here, the turbines are placed with their axes vertical, under the floating support 10, which is in turn supported by two huils 20. Only the first turbine of each row is shown, the successive turbines are placed behind.
FIG. 9c shows an embodiment of the device 19 analogous to that shown in FIG. 9a, but destined to harness the energy of a wind stream, and therefore the turbines are placed with their axes above the floating support.
FIGS. 10 to 12 show an embodiment of the invention comprising four rows, each provided with six successive turbines 9, arranged with their axes horizontal and in the same plane. The floating support 10 is basically a catamaran wherein the two hulls 10A, 108 support the axes of the turbines 9.
Four rigid sails/ wings 10C fixed on the ends of the hulls' 10A, 10B serve for orienting the base. The hulls 10A, 10B have floodable spaces inside that can extend in reservoirs placed inside the wings, which then contribute to control the water level. Although, there are six turbines in each row, it is obvious that more turbines can be provided to harness the maximum energy from the waves or current.
In this text, the term "comprises" and its derivations (such as "comprising", etc.) should not be understood in an excluding sense, that is, these terms should not be interpreted as excluding the possibility that what is described and defined may include further elements, steps, etc.
The invention is obviously not limited to the specific embodiments described herein, but also encompasses any variations that may be considered by any person skilled in the art (for example, as regards the choice of materials, dimensions, components, configuration, etc.), within the general scope of the 5 invention as defined in the claims.
References (1) Circular cylinder, without blades.
10 (2) Pressure distribution.
(3) Uniform speed flow wherein the cylinder is submerged.
(4) Outboard shaped cylinder.
(5) Bent sheet blades (6) Aerodynamic blades (7) Rotating direction.
(9) Flow direction between blades.
(9) Cross-flow cylindricalTurbines.
(10) Floating support.
(10A, 10B) Hulls.
(10C) Rigid sails.
(3) Uniform speed flow wherein the cylinder is submerged.
(4) Outboard shaped cylinder.
(5) Bent sheet blades (6) Aerodynamic blades (7) Rotating direction.
(9) Flow direction between blades.
(9) Cross-flow cylindricalTurbines.
(10) Floating support.
(10A, 10B) Hulls.
(10C) Rigid sails.
(11) Water surface oscillating (waves) with respect to the turbines.
(12) Bottom hull.
(12A, 12B) Side Hulls.
(12A, 12B) Side Hulls.
(13) Waves approaching the device.
(14) Anchorage.
(15) Means for conveying energy from an axis to another power type of energy.
(16) Incoming waves.
(17) External limit surface.
(18) Useful frontal fluid flux.
(19) Device for generation of electricity.
(20) Hulls.
Claims (6)
1.- Device for converting kinetic energy from a flow of waves, or water currents into mechanical energy of rotation, comprising a plurality of cross flow turbines, each of the cross flow turbines comprising fixed curved blades arranged in a squirrel cage configuration about an axis of rotation, wherein the cross flow turbines are mounted on a floating support on the flow, such that the cross flow turbines are directly placed in the flow, and arranged successively one after another with the axis of rotation of each of the cross flow turbines parallel to each other and perpendicular to the flow, wherein the floating support has a U-cross section profile that forms a channel, such that a bottom hull and two side hulls are defined, the axis of rotation of the turbines being rotatably supported between the two side hulls and comprising floating control means that are fl ood a ble floats, so that the device is movable between a lower position where the cross flow turbines are completely sunk and an upper position where the cross flow turbines are arranged completely above a fluid level.
2.- Device according to claim 1, wherein the axis of rotation of the turbines are contained in the same plane.
3.- Device according to any one of claims 1 to 2, wherein the axis of rotation of the cross flow turbines are arranged at regular intervals.
4.- Device according to any one of claims 1 to 3, wherein the fixed curved blades of the cross flow turbines have a cylindrical envelope.
5.- Device according to any one of claims 1 to 4, wherein the floating support comprises means for anchoring to the seabed.
6.- Device according to any one of claims 1 to 5, the device being without deflectors or baffles.
Date Recue/Date Received 2023-01-23
Date Recue/Date Received 2023-01-23
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15382473.5 | 2015-09-29 | ||
EP15382473.5A EP3150846B1 (en) | 2015-09-29 | 2015-09-29 | Device for converting kinetic energy of a flow from waves, wind or water currents into mechanical energy of rotation |
PCT/ES2016/070474 WO2017055649A1 (en) | 2015-09-29 | 2016-06-23 | Device for converting the kinetic energy of waves, water flows or wind into mechanical energy |
Publications (2)
Publication Number | Publication Date |
---|---|
CA3002254A1 CA3002254A1 (en) | 2017-04-06 |
CA3002254C true CA3002254C (en) | 2023-11-14 |
Family
ID=54288736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA3002254A Active CA3002254C (en) | 2015-09-29 | 2016-06-23 | Device for converting the kinetic energy of waves, water flows or wind into mechanical energy |
Country Status (13)
Country | Link |
---|---|
US (1) | US10683840B2 (en) |
EP (1) | EP3150846B1 (en) |
JP (1) | JP2018530708A (en) |
CN (1) | CN108350858A (en) |
AU (1) | AU2016329614B2 (en) |
CA (1) | CA3002254C (en) |
CL (1) | CL2018000806A1 (en) |
DK (1) | DK3150846T3 (en) |
ES (1) | ES2718173T3 (en) |
MX (1) | MX2018003722A (en) |
PL (1) | PL3150846T3 (en) |
PT (1) | PT3150846T (en) |
WO (1) | WO2017055649A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2020236379B2 (en) * | 2019-03-08 | 2023-08-17 | Big Moon Power, Inc. | Systems and methods for hydro-based electric power generation |
CN110439730B (en) * | 2019-08-02 | 2021-03-30 | 庄茜茜 | Enhanced wave power generation device |
CN112302873B (en) * | 2020-10-19 | 2022-03-01 | 上海电气风电集团股份有限公司 | Offshore floating type power generation platform |
KR102293440B1 (en) * | 2021-02-14 | 2021-08-25 | 이병찬 | Water stream and wind power generation apparatus |
CN112999855A (en) * | 2021-04-15 | 2021-06-22 | 纪广波 | Waste gas treatment equipment |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5136174A (en) * | 1990-11-20 | 1992-08-04 | Simoni Richard P | Multi-paddlewheel system for generating electricity from water canal |
ES2074010B1 (en) | 1993-07-14 | 1998-05-16 | Univ Pais Vasco | AERODYNAMIC PROFILES OF SIMPLE GEOMETRY |
KR100191636B1 (en) | 1995-12-23 | 1999-06-15 | 전성권 | Hydraulic power generation system |
GB0329589D0 (en) * | 2003-12-20 | 2004-01-28 | Marine Current Turbines Ltd | Articulated false sea bed |
US8403622B2 (en) * | 2005-02-09 | 2013-03-26 | Prime Energy Corporation | Radial-flow, horizontal-axis fluid turbine |
US20090175723A1 (en) * | 2005-10-06 | 2009-07-09 | Broome Kenneth R | Undershot impulse jet driven water turbine having an improved vane configuration and radial gate for optimal hydroelectric power generation and water level control |
US8350396B2 (en) * | 2009-03-17 | 2013-01-08 | Harry Edward Dempster | Water-current paddlewheel-based energy-generating unit having a tapered partial covering structure |
CN102947583A (en) * | 2010-02-22 | 2013-02-27 | 海德福斯公司 | Driving engine (water turbine) of hydrokinetic floating power plant with enhanced efficiency degree, and hydrokinetic floating power plant module |
KR20110107881A (en) * | 2010-03-26 | 2011-10-05 | 홍문표 | Wave power generation apparatus with the horizontal water turbines on the barge |
US8341957B2 (en) * | 2010-04-20 | 2013-01-01 | Joseph Erat S | Portable wave-swash and coastal-wind energy harvester |
US20120007361A1 (en) * | 2010-07-09 | 2012-01-12 | Pete Agtuca | Water Handling Environment Water Electric Generator |
US8525363B2 (en) * | 2011-07-27 | 2013-09-03 | Dlz Corporation | Horizontal-axis hydrokinetic water turbine system |
US9086047B2 (en) * | 2011-09-17 | 2015-07-21 | Karim Salehpoor | Renewable energy extraction device |
US8772957B2 (en) * | 2011-11-23 | 2014-07-08 | John Herman Willingham | Power generating floating vessel |
BE1021091B1 (en) * | 2012-10-11 | 2015-11-27 | VAN ROMPAY BOUDEWIJN GABRIëL | DEVICE FOR GENERATING HYDRO-ELECTRIC ENERGY |
EP2946107B1 (en) * | 2013-01-17 | 2019-02-20 | Boudewijn Gabriel Van Rompay | Device for generating hydro-electric energy |
KR101578537B1 (en) * | 2013-10-18 | 2016-01-04 | 김유일 | Floating water turbine generator efficiency |
KR101492768B1 (en) | 2014-05-12 | 2015-02-12 | 한국해양대학교 산학협력단 | Floating wave power generation device using the cross flow turbine |
KR101509729B1 (en) * | 2014-08-26 | 2015-04-07 | 이재혁 | Tidal current power generator |
US20170130690A1 (en) * | 2015-11-11 | 2017-05-11 | Edward Lilly | Barge electrical generation system |
-
2015
- 2015-09-29 EP EP15382473.5A patent/EP3150846B1/en active Active
- 2015-09-29 PL PL15382473T patent/PL3150846T3/en unknown
- 2015-09-29 ES ES15382473T patent/ES2718173T3/en active Active
- 2015-09-29 DK DK15382473.5T patent/DK3150846T3/en active
- 2015-09-29 PT PT15382473T patent/PT3150846T/en unknown
-
2016
- 2016-06-23 MX MX2018003722A patent/MX2018003722A/en unknown
- 2016-06-23 JP JP2018535253A patent/JP2018530708A/en active Pending
- 2016-06-23 CA CA3002254A patent/CA3002254C/en active Active
- 2016-06-23 AU AU2016329614A patent/AU2016329614B2/en active Active
- 2016-06-23 WO PCT/ES2016/070474 patent/WO2017055649A1/en active Application Filing
- 2016-06-23 US US15/764,548 patent/US10683840B2/en active Active
- 2016-06-23 CN CN201680062565.XA patent/CN108350858A/en active Pending
-
2018
- 2018-03-28 CL CL2018000806A patent/CL2018000806A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
US20180274516A1 (en) | 2018-09-27 |
EP3150846A1 (en) | 2017-04-05 |
AU2016329614A1 (en) | 2018-05-10 |
US10683840B2 (en) | 2020-06-16 |
JP2018530708A (en) | 2018-10-18 |
EP3150846B1 (en) | 2018-12-26 |
ES2718173T3 (en) | 2019-06-28 |
WO2017055649A1 (en) | 2017-04-06 |
DK3150846T3 (en) | 2019-04-08 |
PT3150846T (en) | 2019-04-01 |
PL3150846T3 (en) | 2019-10-31 |
AU2016329614B2 (en) | 2020-10-22 |
CA3002254A1 (en) | 2017-04-06 |
MX2018003722A (en) | 2018-11-09 |
CL2018000806A1 (en) | 2018-06-08 |
CN108350858A (en) | 2018-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA3002254C (en) | Device for converting the kinetic energy of waves, water flows or wind into mechanical energy | |
EP2659128B1 (en) | Method and apparatus for energy generation | |
AU746011B2 (en) | Extracting power from moving water | |
WO2010104475A1 (en) | Device and system for extracting tidal energy | |
US9309861B1 (en) | Ocean wave kinetic energy conversion method and system | |
US20110187112A1 (en) | Hydro-kinetically powered electrical generator power head | |
US20120086208A1 (en) | Environmentally Safe Flowing Water and Air Energy Device With Power Output Optimization | |
GB2396888A (en) | Wind or water currect turbine | |
US9284941B2 (en) | Natural energy extraction apparatus | |
EP3619422A1 (en) | Flow turbine for hydro power plants | |
KR101594754B1 (en) | A water wheel for power generation | |
KR101261780B1 (en) | A generating module for following a tidal current and a generating apparatus having the same | |
CN101680420A (en) | System for generating electric power | |
US8007231B2 (en) | Flowing water energy device | |
KR101183378B1 (en) | Multy Screw Type Hydraulic Turbine | |
GB2549283A (en) | Ocean wave kinetic energy conversion method and system | |
US20140138955A1 (en) | Vertical axis mooring rotor | |
EP2769087B1 (en) | Apparatus and method for tidal energy extraction and storage | |
WO2011138749A1 (en) | Plant for the exploitation of marine or river currents for the production of electricity | |
SK5510Y1 (en) | Flow turbine with pivoted blades | |
BG109645A (en) | Zero head water turbine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request |
Effective date: 20210608 |
|
EEER | Examination request |
Effective date: 20210608 |
|
EEER | Examination request |
Effective date: 20210608 |
|
EEER | Examination request |
Effective date: 20210608 |
|
EEER | Examination request |
Effective date: 20210608 |
|
EEER | Examination request |
Effective date: 20210608 |
|
EEER | Examination request |
Effective date: 20210608 |